I know every one says eBay parts are **** but I was wondering what the deal with the $10 sensor replacements that I guess add 20 hp??? Do they burn up you engine too?? If I can gain 20 hp for 10 bucks sign me up...but it sounds too good to be true. Also is there any thing like this that really works for my little d15b7?don't say"search" i wouldn't know what to look for?